Category: Documentation
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White Rabbit: a PTP Application for Robust Sub-nanosecond Synchronization
Authors: Maciej Lipinski, Tomasz Włostowski, Javier Serrano, Pablo Alvarez – CERN, Geneva Abstract: This article describes time distribution in a White Rabbit Network. We start by presenting a short overview of the White Rabbit project explaining its requirements to highlight the importance of the timing aspects of the system. We then introduce the technologies used…
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White Rabbit Applications and Enhancements
Authors: M. Lipinski, E. van der Bij, J. Serrano, T. Włostowski, G. Daniluk, A. Wujek, M. Rizzi, D. Lampridis – CERN, Geneva, Switzerland Abstract: This article provides a non-exhaustive overview of applications and enhancements to the White Rabbit (WR) extension of the IEEE 1588 Precision Time Protocol (PTP). Initially developed to serve accelerators at the…
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White Rabbit Absolute Calibration
Authors: Henk Peek, Peter Jansweijer Abstract: White Rabbit (WR) is a widely used implementation to create high accuracy time dissemination networks. Onsite network calibration can be avoided when using absolute calibrated components, which can be freely exchanged withoutrecalibration. Absolute calibration of high accuracy time dissemination network components enables independent developersand/or vendors to exchange their calibrated…
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Ultra-accurate Ethernet Time-Transfer with programmable carrier-frequency based on White Rabbit solution
Authors: Francisco Girela-López, Felipe Torres-González, Javier Díaz Abstract: Synchronization has become a main concern in communication and control systems during the last years. Although there are several standard mechanisms to accomplish timing requirements, development and improvement of high synchronization technologies is required to obtain better performance and quality of service. In this context, the enhanced…
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Temperature Effect on White Rabbit Timing Link
Authors: Hongming Li, Guanghua Gong, Weibin Pan, Qiang Du, and Jianmin Li Abstract: White Rabbit (WR) technology combines gigabit Ethernet data transfer with synchronization at subnanosecond accuracy and picoseconds precision over the same fiber medium. In some applications, the WR link must maintain the synchronization accuracy over a wide temperature range. The temperature effect on…
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Scalability Analysis of the White-Rabbit Technology for Cascade-Chain Networks
Authors: Felipe Torres-Gonzalez, Javier Dıaz, Emilio Marın-Lopez, Rafael Rodriguez-Gomez Abstract: Due to an increase of timing requirements in many actual and future applications, improvements are needed in current synchronization protocols. New scenarios as the Internet of Things or the next generation of 5G Mobile telecommunication networks, where a large number of devices must be interconnected,…
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High Accuracy Synchronization for Distributed Massive MIMO using White Rabbit
Authors: Thomas Bigler, Albert Treytl, David Loschenbrand, Thomas Zemen Abstract: Accurate synchronization is a crucial prerequisite for wireless communication systems and in particular for spatially distributed massive multiple-input multiple-output (MIMO) systems which is also used in the upcoming 5G mobile communication standard. Many applications based on MIMO transmission, such as communication systems or beamforming methods,…
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Using single wavelength light to improve the synchronization accuracy of the White Rabbit system
Authors:Xu Yuan Xu Yuan | Bo Wang Bo Wang Abstract: We demonstrate a new synchronization method for the White Rabbit system. Signals are transmitted in a single mode fiber in both directions with the same light wavelength. Without the complex calibration process of the fiber asymmetry parameter, the new method reduces the effect of chromatic…
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10 Gigabit White Rabbit: Sub-Nanosecond Timing and Data Distribution
Authors: Miguel Jiménez-López; Francisco Girela-López; Jose López-Jiménez; Emilio Marín-López; Rafael Rodríguez; Javier Díaz Abstract: Time synchronization is a critical feature for many scientific facilities and industrial infrastructures. The required performance is progressively increasing everyday, for instance, few tens of nanoseconds for Fifth Generation (5G) networks or sub-nanosecond accuracy on next family of particle accelerators and…
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WRS v6.1 user manual
Authors: J-C. Bau, G. Daniluk, M. Lipinski, B. Rat, A. Rubini, F. Vaga, A. Wujek Abstract: The White Rabbit switch (or wrs) is a major component of the White Rabbit (wr) network. Like any modern managed switch, the wrs includes a CPU with its own operating system. This manual is for people installing wrs devices,…